fix: Prioritize 7z for MSI extraction when both unzip and 7z are installed(fixed the issue)

[rudrajosh]

Fix: Prioritize 7z for MSI extraction when both unzip and 7z are installed

This pull request addresses a bug in cve-bin-tool related to MSI file extraction.

• Problem: MSI extraction failed when both unzip and 7z were installed.
• Cause: The tool's logic in extractor.py incorrectly prioritized unzip for MSI files, which unzip doesn't handle reliably.
• Solution: Modified the extract_file_zip function in extractor.py.
  • Now, the tool checks for the .msi extension first.
  • If the file is an MSI, it attempts extraction using 7z.
  • If 7z fails or is not present, it falls back to unzip for other ZIP archives.
• Benefit: Ensures correct MSI extraction in environments with both unzip and 7z.
• Impact: Improves the robustness of cve-bin-tool when analyzing Windows installer packages.